ORS 92: Oregon Partition, Subdivision, and Plat Rules

Under ORS Chapter 92, Oregon’s subdivisions and partitions law, you can divide land only by following a defined process: apply to the city or county with a tentative plan, meet survey and zoning standards, clear all property taxes, and record a final plat prepared by a registered professional land surveyor. ORS 92.012 is blunt about it — no land may be subdivided or partitioned except in accordance with ORS 92.010 through 92.192.¹ Which track you’re on, and how heavy the oversight gets, depends first on how many new units you’re creating.

Partition or Subdivision

The split turns on a single number: how many new units of land you create within one calendar year. Three or fewer is a partition, and the pieces are called “parcels.” Four or more in that same year is a subdivision, and the pieces are called “lots.”² The labels matter because the chapter applies different rules to each.

Partitions get lighter review. The county surveyor checks a partition plat only against the survey-related provisions of the statute. A subdivision plat gets the fuller treatment: the surveyor visits the site, takes measurements, and verifies computations.³

What Doesn’t Count as a Partition

Several boundary changes look like partitions but aren’t, under the definition in ORS 92.010(9):²

Land divided through a lien foreclosure or foreclosure of a recorded sales contract.
Property line adjustments between two existing parcels (handled separately under ORS 92.192).
Land divided through the recording of a subdivision or condominium plat.
Land conveyed to a public agency for a highway, county road, city street, or other right of way, provided the road complies with the applicable comprehensive plan.

The right-of-way exclusion is the one that confuses people most. If a county buys a strip for a road, the conveyed strip keeps being treated as part of the original unit until the land is further divided. Your unit count doesn’t change.

Getting a Division Approved

Before any plat gets recorded, you submit a written application to the city or county with jurisdiction. The application has to include a tentative plan showing the general design of the division.⁴ Think of the tentative plan as a blueprint: proposed boundaries, street layout, how the division fits the surrounding area.

Local governments set their own application forms and additional requirements through ordinances adopted under ORS 92.044. Getting the tentative plan right matters, because the final plat has to be in substantial conformity with whatever tentative plan gets approved.⁵

Standards the Plan and Plat Must Meet

Local governments don’t have unlimited discretion. ORS 92.090 sets baseline requirements every tentative plan must satisfy:

Streets and roads must conform to the plats of adjacent subdivisions and partitions in width, general direction, and other respects, unless the city or county finds a modification serves the public interest.
Any streets or roads intended for private use must be clearly indicated, with all restrictions spelled out.
The plan must comply with all applicable zoning ordinances and any local regulations adopted under ORS 92.044.

For the final plat, public streets and roads must be dedicated without reservation or restriction, other than reversionary rights if a road is later vacated, and the dedication must include easements for public or private utilities.⁵ On utility easements specifically, ORS 92.044 limits how far a city or county can push: unless a utility provider actually requests one, the governing body cannot require a utility easement except along a street.⁶

Subdivision names are also screened. The county surveyor (or county assessor if there’s no county surveyor) must approve the name, and no subdivision can share a name with an existing subdivision in the same county unless the land is contiguous and platted by the same party, or the original party consents in writing.⁵

Survey, Monuments, and Plat Format

ORS 92.050 requires the survey and plat to be prepared by a registered professional land surveyor. The plat has to be drawn at a scale, approved by the county surveyor, large enough that mathematical information, boundary lengths, street names, and lot or parcel numbers are clearly legible.⁷

Physical monuments on the ground are mandatory. ORS 92.060 sets specifications for monuments at the initial point, at street intersections and curve points, wherever the exterior boundary changes direction on a subdivision plat, and at all lot and parcel corners other than cemetery corners.⁸ Specifications are exact for a reason: boundary disputes decades later often turn on whether the original monuments are still in place and identifiable.

Paying Taxes Before Recording

A plat cannot be recorded until all ad valorem taxes on the land are paid, including additional taxes, interest, penalties from special assessment disqualifications, and any fees or charges that have become a lien or will become one during the tax year.⁹

Timing can be awkward. If your plat is ready to record after July 1 but before the new tax roll is certified, the exact current-year tax may not be calculable yet. In that window you have two options: pay the assessor’s estimated amount, or deposit a bond or irrevocable letter of credit in an amount the assessor considers adequate, which cannot exceed twice the previous year’s taxes and charges. If a deficiency turns up later, it becomes a personal debt of the person who did the dividing. It does not attach as a lien against the newly created lots or parcels.³

Recording the Plat

The county surveyor must approve the plat before it goes to recording. For a subdivision plat, the surveyor checks the site itself and verifies compliance with the survey-related provisions of ORS 92.010 through 92.192 and ORS 209.250. For a partition plat, the review is limited to the plat document, with no site visit required.³

Once approved and offered for recording, the county recording officer must record the plat upon payment of the applicable fees.¹⁰ The person offering the plat for recording must also file an exact copy with the county surveyor on material meeting the surveyor’s durability standards. Recording is what makes the division legally real; until the plat is recorded, the new lots or parcels do not exist as separate units of land.

How Long Tentative Approval Lasts

Tentative approval has a shelf life. Local governments can set their own expiration periods, but the state law maximum is 10 years, and if no local period is set, that 10-year ceiling still applies.⁴

Middle housing land divisions under ORS 92.031 run on a tighter clock: tentative approval goes void if the final plat is not approved within three years.³ Miss either deadline and the application starts over.

When You Can Sell the New Lots or Parcels

Oregon stacks two prohibitions on top of each other.

Before tentative plan approval, you cannot sell a subdivision lot, and you cannot even negotiate to sell one. Partitions get slightly more room: you can negotiate to sell a parcel before tentative approval, but you cannot close the sale until approval comes through.¹¹

Even after tentative approval, you still cannot sell a lot or parcel until the plat has been acknowledged and recorded with the county recording officer. You can use the approved tentative plan during negotiations, but the sale itself has to wait for recording.¹²

One narrow exception: a city or county can waive the plat recording requirement for parcels created in excess of 80 acres, though minimum area requirements from acknowledged comprehensive plans and land use regulations still apply.¹²

If You Bought an Improperly Divided Parcel

If the land you purchased turns out not to be a lawfully established unit, ORS 92.018 lets you sue the seller for damages or equitable relief, and the court must award reasonable attorney fees to the prevailing party.¹³

The one exception: if the seller is a county that acquired the property involuntarily through tax lien foreclosure under ORS Chapter 312, the buyer has no claim for damages or equitable relief.¹³

Property Line Adjustments

Moving a boundary between two abutting properties is handled separately under ORS 92.192 because it does not create a new unit of land.¹⁴ After the adjustment, both units still have to comply with applicable zoning ordinances. Outside city limits, a county has some flexibility: it can approve an adjustment even if one or both parcels are smaller than the zoning minimum, as long as the result either brings a parcel up to the minimum size or at least doesn’t make the existing nonconformity worse.

Resource land gets stricter treatment. On land zoned for exclusive farm use, forest use, or mixed farm and forest use, a property line adjustment cannot be used to shuffle acreage in a way that qualifies a unit of land for a dwelling it wouldn’t otherwise qualify for. The statute lists four specific scenarios that are prohibited, all directed at preventing adjustments from being used as a backdoor to create new dwelling-eligible parcels on resource land.¹⁴ A seemingly simple boundary move on farmland can be denied for exactly this reason.

1
Oregon Public Law. Oregon Revised Statutes 92.012 – Compliance With ORS 92.010 to 92.192 Required
2
Oregon Public Law. Oregon Revised Statutes 92.010 – Definitions for ORS 92.010 to 92.192
3
Oregon State Legislature. Oregon Revised Statutes Chapter 92 – Subdivisions and Partitions
4
Oregon Public Law. Oregon Code 92.040 – Application for Approval of Subdivision or Partition
5
Oregon Public Law. Oregon Code 92.090 – Approval of Subdivision Plat Names; Requisites for Approval of Tentative Subdivision or Partition Plan or Plat
6
Oregon Public Law. Oregon Code 92.044 – Adoption of Standards and Procedures Governing Approval of Plats and Plans
7
Oregon Public Law. Oregon Revised Statutes 92.050 – Requirements of Survey and Plat of Subdivision and Partition
8
Oregon Public Law. Oregon Code 92.060 – Marking Subdivision, Partition or Condominium Plats With Monuments
9
Oregon State Legislature. Oregon Code 92.095 – Payment of Taxes, Interest or Penalties Before Subdivision or Partition Plat Recorded
10
Oregon Public Law. Oregon Revised Statutes 92.120 – Recording Plats; Filing Copies; Preservation of Records
11
Oregon Public Law. Oregon Revised Statutes 92.016 – Sale or Negotiation to Sell Lot or Parcel Prior to Approval of Tentative Plan
12
Oregon Public Law. Oregon Revised Statutes 92.025 – Prohibition of Sale of Lot or Parcel Prior to Recordation
13
Oregon Public Law. Oregon Revised Statutes 92.018 – Buyer’s Remedies for Purchase of Improperly Created Unit of Land
14
Oregon Public Law. Oregon Revised Statutes 92.192 – Property Line Adjustment